Screw



FIG. 1 is a perspective view of a screw, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof.

The broken lines in the drawings illustrate portions of the screw and form no part of the claimed design. 

CLAIM We claim the ornamental design for a screw, as shown and described. 